I have the same problems, i have tried everything but my phone is driving me mad. The keypad keeps disappearing apps keep cutting off. Apps keep opening on there own. My alarm either switches itself on or off. It regularly just freezes, now when im trying to watch videos in chrome the video cuts out but the sound keeps playing though very juttery and i can't find a way to stop it other than switch my phone off. I sm so close to throwing this waste of money off a wall otherwise im sure it is going to drive me crazy